MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The average annual cost (including tuition, room, board, books and fees) to attend a public college takes nearly a third of the annual income of a typical family with college-age children (Money, April 2012). At private colleges, the average annual cost is equal to about 60% of the typical family's income. The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars.

Private Public
52.8 20.3
43.2 22.0
45.0 28.2
33.3 15.6
44.0 24.1
30.6 28.5
45.8 22.8
37.8 25.8
50.5 18.5
42.0 25.6
  14.4
  21.8

Develop a 95% confidence interval of the difference between the annual cost of attending private and pubic colleges.95% confidence interval, private colleges have a population mean annual cost ____ to ____.

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